Preserve font properties when applied to all the document

[rvasseur31]

📝 Provide detailed reproduction steps (if any)

1. Add text with one break line between each paragraph
2. Select all document and apply a font property like font size, font family or bold
3. Place the cursor on an empty line
4. Write text

✔️ Expected result

The text should have the font properties that we applied to the all document

❌ Actual result

The text have the defaults properties. It might be liked to #17152

Screen.Recording.2024-10-03.at.10.16.24.mov

📃 Other details

• Browser: Brave or Chrome
• OS: MacOS Sonoma (Not tested on windows)
• First affected CKEditor version: 43.1.0 (Not tested on previous versions)
• Installed CKEditor plugins: Alignment, AutoLink, Autoformat, Bold, Essentials, FontBackgroundColor, FontColor, FontFamily, FontSize, GeneralHtmlSupport, Heading, Italic, Link, List, Paragraph, RemoveFormat, SelectAll, Strikethrough, Underline, Undo

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[Witoso]

I think there's a dup somewhere, but I couldn't find it. For the editor, the default is the stylesheets. Removal of the whole text is back to the defaults. We don't have a notion of changing dynamically the default font while interacting with fonts plugins (as it works in GDoc for example).

[Witoso]

Found it! DUP: #10517